Cooling device with an endothermic chemical reaction

Patent metadata

Field	Value
Publication number	US-11656019-B2
Application number	US-201916967905-A
Country	US
Kind code	B2
Filing date	Feb 5, 2019
Priority date	Feb 12, 2018
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A cooling device uses an endothermic chemical reaction for cooling. The cooling device includes a sealed casing with at least two reagents that generate an endothermic chemical reaction when they come into contact. The cooling device further includes a separating membrane separating the reagents in a storage position; a contact-making system which can be activated and configured to bring the reagents into contact with one another when activated, an interface element for activating the contact-making system; and a thermal interface with a thermally conductive metal base plate. One of the surfaces of the base plate is subjected to the endothermic chemical reaction, and the other surface of the base plate is accessible from outside the cooling device.

First claim

The invention claimed is:

1. A cooling device, comprising:
a sealed envelope comprising at least two reagents, the at least two reagents being such that bringing them into contact generates an endothermic chemical reaction;
at least one separation membrane configured to separate the at least two reagents in a storage position;
at least one contact-making system configured to be activated and to bring into contact said at least two reagents when the contact-making system is activated, contact between the at least two reagents triggering the endothermic chemical reaction;
an interface element configured to receive an external command which is transmitted to the contact-making system in order to activate the contact-making system;
at least one thermal interface comprising a flat thermally conductive metal soleplate, wherein one face of the flat thermally conductive soleplate is subjected to the endothermic chemical reaction, another face of the flat thermally conductive soleplate is accessible from outside of the cooling device; and
means configured to reduce a pressure generated by the endothermic chemical reaction in a chamber in which the endothermic chemical reaction occurs.

2. The device according to claim 1 ,
wherein the device comprises a plurality of groups of the at least two reagents, the reagents of each of the plurality of groups of the at least two reagents being configured to be brought into contact to generate an endothermic chemical reaction.

3. The device according to claim 1 ,
wherein bringing the at least two reagents into contact generates an endothermic base acid reaction.

4. The device according to claim 1 ,
wherein the means for reducing the pressure comprise at least one mechanical element configured to evacuate the gases from said chamber.

5. The device according to claim 1 ,
wherein the means for reducing the pressure comprise at least one deformable wall of said chamber.

6. The device according to claim 1 ,
wherein the contact-making system comprises a rotating blade system configured to tear the separation membrane.

7. The device according to claim 6 ,
wherein the rotating blade system is configured to mix the at least two reagents.

8. The device according to claim 1 ,
wherein the contact-making system comprises at least one pyrotechnical trigger.

9. The device according to claim 8 ,
wherein the pyrotechnical trigger is configured to project one of the at least reagents to tear the separation membrane and to bring the one of the at least two reagents into contact with the other of the at least two reagents.

10. The device according to claim 9 ,
wherein the device comprises at least two assemblies, each assembly comprising one of the at least two reagents and an associated pyrotechnical trigger.

11. The device according to claim 1 ,
wherein one of the at least two reagents is one of a liquid or dissolved in a liquid, the other of the at least two reagents being solid and provided with extended holes, the contact-making system comprising at least one servo pump configured to circulate the liquid reagent in the extended holes of the solid reagent to bring said reagents into contact.

Assignees

• Mbda France

Inventors

• Iatrides Clément
• Verin Fabrice

Classifications

• F41A13/00

  Cooling or heating systems; Blowing-through of gun barrels; Ventilating systems · CPC title

• F42B15/34

  Protection against overheating or radiation, e.g. heat shields; Additional cooling arrangements {(thermal protection fitted in or to cosmonautic vehicles B64G1/58)} · CPC title

• B01J2219/00162

  controlling the pressure · CPC title

• F41A13/12

  Systems for cooling the outer surface of the barrel (F41A13/10, F41A21/24 take precedence) · CPC title

• F25D2303/085

  Compositions of cold storage materials · CPC title